Forced air space heater with air-cooled motor



Aug. 4, 1953 s. J. HEIMAN FORCED AIR SPACE HEATER WITH AIR-COOLED MOTOR Filed Jan. 10, 1950 FIG. 2

/Nl ENTOE SIDNEY J. HEIMAN 5y.- 6 OENEY Patented Aug. 4, 1 953 FORCED AIR SPACE HEATER WITH AIR-COOLED MOTOR Sidney J. Heiman, St. Louis, Mo. Application January 10, 1950, Serial No. 137,810 1 Claim. (01. 126-110) This invention relates to space heaters wherein the heated air is forcibly discharged from adjacent the bottom of the heaters, and more particularly to means for cooling said air-forcing means during the operation of the heater. The invention has among its objects, the production of such a heater that will be relatively simple in construction, positive in action, safe in its operation, comparatively inexpensive to make, will move suficiently large volumes of air at all times during operation, and which will be otherwise satisfactory and effi-cient for use wherever deemed applicable.

One of the important objects of my invention is to so construct such a heater that the same will have three independent air-currents flowing 'therethrough, the first one for supplying the air for the combustion chamber, the second one for supplying the air to be heated and thence discharged from adjacent the bottom of the heater, and the third current to supply a medium for enveloping and cooling the motor that causes the circulation of said second current of air.

Another object of the invention is to build the aforesaid heater that the air to be heated and thence discharged to the place desired, is taken into the heater at substantially the top of the same so as to be at a comparatively high temperature at entrance, while the coolant air is entrained at adjacent the bottom of the heater so as to be initially at substantially low temperature.

A further object of my invention is to so construct a heater of the kind described, that said coolant air, after it has performed its cooling effect on the motor that actuates the body of heated air through its path, will be discharged into and intermingledwith the said last-mentioned body of air, the volume of said coolant air being so minute in comparison to said volume of heated air as to have no material effect in lowering the temperature of the latter at discharge.

Many other objects and advantages of the construction herein shown and described, and the uses mentioned, will be obvious to those skilled in the art to which this invention appertains, as will b more clearly apparent from the disclosures herein given.

In the drawings, wherein like reference characters represent like or corresponding parts throughout the views,

Figure 1 is a vertical cross-section view through my improved heater;

Figure 2 is a fragmentary perspective view of a portion of the same, adjacent its lower end; and

Figure 3 is a transverse cross-sectional view,

taken substantially along the line 33 of Fig. 1.

Referring more particularly to the drawings, wherein I have illustrated the preferred embodiment of my invention, there is shown a heater of the type wherein the products of combustion are discharged beyond the room wherein the heater is to be located, and the heating of any predetermined space is done by entraining air into the heater and forcibly moving such air downwardly to absorb the heat from said combustion chamber and thence discharging the air thus heated, from adjacent the bottom of the heater.

The combustion chamber or drum I is preferably cylindrical ahd extends upright from the lower portion of the heater to adjacent the top of the same, this drum or shell having an open bottom end 2 and is closed by the top end 3, the latter end receiving the flue ll extending upwardly and for carrying off the products of combustion to the outside atmosphere in the usual manner.

A pot or burner 5 is mounted in the lower end of said drum, for receiving the stream of oil or other combustible fluid for generating the heat for the device, said pot preferably provided with openings 6 therethrough that communicate with air entering the drum through the open bottom end 2 of the latter.

A second shell I is arranged concentric with the shell I so as to be spaced radially thereabout to provide an annular air passageway 8 between the shells, the upper end of the shell 1 terminating at or above the top end 3 of the drum l.

, Abaflle 9 is provided transversely to bridge between said pair of shells and close the same thereat, except for providing an open space H] or passageway between a reduced area between said shells, whereby air can not pass through the space between said shells except at said space ID.

Enclosing said pair of shells and concealing the other mechanism of the device, is a closure or casing of any desired cross-sectional shape, as for example the square shape shown, with the upright walls H, said casing being provided with a top closure i2 through which the flue 4 projects. Louvers or other openings I 3 are provided through one or more walls of the casing, adjacent the upper end of the latter, and through which air may be entrained to follow the path indicated by the arrows, as will be more clearly hereinafter set forth.

A bafile l4 may be provided intermediate the ends of said casing, at about the height of said 

